Duplicating milling machine



Dec. 8, 1953 c. M. zo| 2,661,661

DUPLICATING MILLING MACHINE Filed Sept. 21, 1951 7 Sheets-Sheet 1 Q INVENTOR Q Q rZ/Z ZaZ.

ATTORNEY Dec. 8, 1953 c. M. ZOLL DUPLICATING MILLING MACHINE 7 Sheets-Sheet 2 Filed Sept. 21, 1951 INVENTOR- ATTORNEY Dec. 8, 1953 c. M. zou.

DUPLICATING MILLING MACHINE 7 Sheets-Sheet 3 Filed Sept. 21, 1951 I N VEN TOR Carl 1% ,Z'0Z

BY ATTORNEY Dec. 8, 1953 c. M. ZOLL 2,661,661

DUPLICATING MILLING MACHINE Filed Sept. 21, 1951 7 Sheets-Sheet'4 I INVENTOR Car} AZ ZaZZ,

/ ATTORNEY Dec. s, 1953 c. M. 2014. ,66 DUPLICATING MILLING MACHINE Filed Sept. 21, 1951 7' Sheets-Sheet 5 ATTORNEY Dec. 8, C. M. ZOLL I DUPLICATING MILLING MACHINE File d Sept. 21, 1951 7 Sheets-Sheet 7 74 faz'ifi. ZaZZ 49 34 BY m ATTORNEY Patented es. 8, 1953 DUPLICATING MILLING MACHINE Carl Michael Zoll, New Orleans, La, assignor to Hydro Power, Inc., New Orleans, La.

Application September 21, 1951, Serial No. 247,657

9 Claims.

I'his invention relates to contour duplicating machines and has special reference for a machine for duplicating such contours as exists in cams and like.

Many attempts have been made to produce accurate duplicates of contours by milling a blank, the action of which is controlled by a pattern, but such machines as now exist have been found to lack the accuracy required in most cases, the duplicate often varying from the pattern so that a tolerance of not less than .008 is thought to be sumcient. In the present machine forming the subject matter of this application, actual tests on the machine show that the duplicate produced is correct to the pattern with a tolerance of .0005.

One object of the invention therefore is to provide a contour duplicating machine wherein the construction is such that the tolerance between the pattern and the duplicate shall be less than .001.

A second important object of the invention is to provide a machine of this character wherein a pattern and a blank are caused to revolve in unison, a feeler engaging the pattern and a milling cutter acting on the blank.

A third important object of the invention is to provide a machine of this character having a feeler support and a milling cutter support so carried and arranged as to prevent tilting or give of any kind between the movement of the feeler and the movement of the cutter.

The fourth important object of the invention is to provide a machine of this character equipped with a standard indexing plate so that when it is desired to form a cam having a series of successive equal portions each embodying a high point and a low point, a pattern may be utilized embodying only one such high and low point section, the indexing plate being set to cause accurate repetition of the pattern about the blank.

The fifth important object of the invention is to provide a machine of this character having means for accurately adjusting and maintaining distance between the axis of the cutter and the pattern contacting point of the feeler.

A sixth object of the invention is to provide a machine of this character wherein the pattern or templet and the blank may be readily removed and replaced and when held in Working positions will be immovably retained in proper axial alignment.

With the above and other object in view, as

sists in general of certain novel details of construction and combinations of parts hereinafter fully described, illustrated in the accompanying drawings and particularly claimed.

In the accompanying drawings, like characters of reference indicate like parts in the several views, and:

Fig. l is a front elevation of a machine constructed in accordance with this invention.

Fig. 2 is a plan view thereof.

Fig. 3 is an end view thereof taken from the right side of Fig. 2.

Fig. 4 is a fragmentary section on the line 4-4 of Fig. 2.

Fig. 5 is a section on the line 5-5 of Fig. 4.

Fig. 6 is a detailed section on the line 6-6 of Fig. 4.

Fig. 7 is a detailed sectional view showing certain clamping means used herewith.

Fig. 8 is a detailed section showing the manner of firmly supporting certain blocks carrying the shafts of the feeler and cutting tool, the support being provided with roller bearing to render adjustment easy when necessary.

Fig. 9 is a detailed section on the line 9-9 of Fig. 8.

Fig. 10 is a view showing certain reverse and speed changing gearing used herewith.

Fig. 11 is a detailed section on the line H-II of Fig. 10.

Fig. 12 is a detailed section on the line I2-l2 of Fig. 1.

Fig. 13 is a detailed section on the line Iii-I3 of Fig. 12 and showing the milling cutter operating on a portion of a blank.

Fig. 14 is a section on the line I i-M of Fig. 12 showing a portion of the pattern or templet and the feeler or guide.

Fig. 15 is an enlarged sectional view showing the indexing arrangement used in the invention.

Fig. 16 is a section on the line lt-Hi of Fig. 1.

Fig. 1'7 is a fragmentary section on the line Il-ll of Fig. 2.

Fig. 18 is an enlarged detail section on the line l8-l8 of Fig. 1.

Fig. 19 is a section on the line Iii-l9 of Fig. 18.

Fig. 20 is an enlarged detail section of the left hand portion of Fig. 4.

Fig. 21 is a fragmentary elevation showing fluid circulating means for use in this invention.

In the construction of the invention as herein embodied there is provided a main table or base l0 supported on legs II. This table is of elongated rectangular form and has an opening l2 will be hereinafter apparent, the invention con- 5 adja ent each end. Below each of the openings I2 is secured a plate it to which is suitably attached a housing Hi. Extending downwardly through each opening i2 is a bearing sleeve l5 having a shoulder 56 adjacent its upper end. The opening 12 is likewise provided at its lower end with a shoulder H and between the shoulder i7 and the shoulder it there is fitted a taper roller bearing indicated generally at 18. At the upper end of the sleeve i5 is a flange l9 to which is secured a spacer plate 29. Integral with each of the spacer plates there is a turntable 2| and means are provided to cause simultaneous rotation of the two turntables as will be presently described. The lower end of the housing has a sleeve 22 extending downwardly therefrom and between the wall of this sleeve 22 and the sleeve l5 there is fitted a tapered roller bearing 23. A suitable packing closure 24 fits around the lower end of the sleeve !5 and engages the sleeve 22, thus closing the housing so that packing grease placed therein will not escape downwardly.

Keyed on the sleeve i5 is a collar 25 and carried by this collar is a worm gear 25 which is engaged by a worm 27 fixed on a shaft 23. Each housing Hl is provided with a pair of alined bearing bosses 29 in which are rotatably fitted the sleeves 30 each having a flange 39a on one end engaging against the inner face of the bearing boss 29 and having an externally threaded outer end 30b projecting from the boss. On end 3% is screwed a nut 300 which acts with the flange 30a to secure the sleeve against rotation in the boss. The outer end 30?) is threaded internally also and is provided with spanner openings 3012. The inner end of the sleeve 30 is eccentrically bored to provide a cylindrical opening in which is fitted a roller bearing c forming one of the bearings supporting the shaft 28. A spacer sleeve 30; is fitted on the shaft 28 between the worm 21 which is integrally formed on the shaft 28 and theroller bearing 39c. A bushing 309 is screwed into the sleeve 39 and bears against the roller bearing 36f to hold the latter in place. This arrangement, best shown in Figs. 18 and 19, affords exact meshing and longitudinal adjustment of the worms with the worm wheels. The two shafts 28 are in alinement and their proximal ends are connected by a suitable coupling 32, thus causing the two shaft sections to revolve in unison.

In order to provide means for driving the shaft 28 at selected speed on one section of said shaft there is keyed a set of graduated gears 33. Suitably supported in bearings 34 is a jack-shaft 35 and on this jack-shaft there is fixed a set of graduated gears 36 so positioned that by shifting the gears 33 longitudinally of the shaft 28, the gears 33 may be selectively engaged with the gears 36, the arrangement being that common in most change gear devices. In order to move the gears when desired, there is provided a shipper 3i pivoted at 38 and having an operating handle 39 carrying a stop member 40 for engagement with a rack bar 4! having suitable openings to receive the stop member 46 in accordance with which the gears 33 and 36 are to be engaged. In order to drive the jack-shaft 35 there is splined in this shaft a pair of confronting bevel gears 42 adapted to be moved into selective engagement with a driving gear G3 fixed on a vertical shaft as journaledas at 45. This gear 43 when engaged by one of the gears t2 will cause rotation of the shaft 35 in one direction while, when engaged by the other gear 42, will cause rotation in the opposite direction. In order to control the-engagement of the gears 42 with the gear 43, there is provided a shipper 46 having a handle 41 in a ignanner similar to the arrangement of the handle Secured to each end of the base Ill and depending therefrom is a bracket Ilia carrying a bearing housing lOb which carries ball bearings 48, wherein is supported the outer end of the shaft 28. Surrounding the outer end of the housing s: is a rib t9 whereto is bolted a standard indexing plate 59 provided with the usual spaced holes 5|. Keyed on the shaft 28 is an indexing arm 52 having an opening 53, in its upper end. Fitted in the opening 53 is a sleeve 55, the outer end of which is circumferentially threaded so that a recessed nut 55 may secure the sleeve in position in the arm 52. Slidable through the nut 58 is a plunger 56 having a collar 51 fitting in the inner end of the sleeve. Between this collar and the nut 55 is a coiled compression spring 58 which urges the plunger inwardly. The inner end or the plunger projects from the sleeve 5 3 and is formed as a pin 59 to selectively fit in one of the openings 5|. At cc is a plate irnmovably secured on the sleeve 5%. The outer end of the plunger 56 has screwed thereon an operating handle El. By means of this arrangement, when the handle is pulled to move the plunger 58 outwardly, the pin 59 releases from the indexing plate and may be shifted to engage at another one or the openings 5 l. Of course, when the pin is thus engaged, the handle ti being released, the handle may be used to rotate the arm 52 and thus to effect rotation of the shaft 28 to any desired degree.

Straddling each end of the base it and up standing therefrom is a yoke 62 and centrally of the length or" the base there is another yoke 63. Each yoke has a pair of spaced guide members or supporting legs 6 between which is fitted a beam Through each beam end extends an adjusting screw 83: which passes through a nut ti, on which is supported a graduated dial it the periphery of which rests on the outer end of a sleeve 59 secured to the beam 65 by bolts iii, suitable thrust bearings ii being held between the nut and the sleeve. On the nut is fixed an operating wheel E2. The graduations of the disk on dial B8 are such that an adjustment of .001 inch may be made for the protraction and retraction of the screw Gt. On the sleeve 59 is secured a pointer or index finger 63a, The dial tit is rotatable on the nut 6? for adjustment relative to the finger 5355a and is secured in adjusted position by means of the thumb screw 68a. Slidably mounted on the beam 55 is a carriage member including a pair of jaws '33 held against the sides of the beam by means of a screw which extends through one jaw and enters a nut i5 projecting inwardly from the opposite jaw. The screw i i is provided with an operating handle it so that no necessity arises for using a wrench or other tool to clamp the jaws properly together. Between the sides of the beam 55 is mounted a pair or" blocks id having ribs '5'; which engage the upper and lower edges of the beam sides as shown in Fig. i. To the outer faces of the beam are bolted bearing plates til and the yokes have fitted therein cooperating bearing races at arranged at each corner of the beam. Between the races 23 and the beveled edges of the plates which thus form opposed races, there are fitted tapered bearings 52. By this arrangement each carriage is firmly mounted on the beam so that while it may slide along the beam as supported by the bearings, it will beheld firmly from any tilting or shaking relative to the beam. The blocks I9 are secured in proper spaced relation by handled bolts I8.

Fixed to the carriage is a socket plate 83 and the screw as enters this socket plate and is held by a tapered pin 84. By rotating the nut 61 each carriage may be moved forwardly and rearwardly on the beam. The beam 65 is provided with a transversely extending longitudinal slot 813 through which the screw iii passes so that upon tightening the screw M, the carriage will be clamped immovably on the beam while, when the screw is loosened, the carriage is free to slide on the beam. Blocks ?9 are formed to provide two grooved members, the grooves being indicated at 89 and, as shown in Fig. 6, confronting each other. Slidably mounted in the opening formed by the grooves 89 is a cylindrical bearing member 9G at one side of which is fixed a rack SI. Extending from one of the sections of the block is a rotatable shaft as carrying a gear 93, which meshes with the rack 9|. An adjusting wheel as is fixed on the shaft 32 and clamp means 95 draw the blocks is to grip on the bearing 90 thus holding it in adjusted position when the same has been attained by the action of the gear on the rack. Extending through an opening in the bearing sleeve til is a spindle 95 which is supported in the bearing sleeve by suitable tapered roller bearings 97. Also packing as is provided to fit around the spindle 96 and in the bearing sleeve SE3. Thus lubricant provided for the spindle will be prevented from escaping improperly,

On the lower end of one of these spindles there is fitted a suitable milling cutter ltawhile on the lower end of the other spindle is fitted a feeler or follower 95b. The carriage for the spindle to which the milling cutter is attached is provided with a T-shaped extension 99, through which this spindle passes upwardly to carry graduated belt pulleys Hit. On one arm of the extension 99 is supported a motor lIlI on the shaft of which there is provided graduated belt pulleys 552. Carried by the other arm of the extension as is a jack-shaft i E13 carrying belt pulleys Hi l. Similarly, the other carriage is provided with an upward extension 1235, the spindle or this carriage extending upwardly through the extension. This spindle also is provided with a belt pulley I E355. The jack-shaft N33 has its pulleys so arranged that they may be selectively connected to the pulleys 592 by a belt I81 and to the pulleys E86 by a belt I83. Also, if desired the pulleys Ilil and the pulley I96 may be connected by a suitable belt.

In the operation of the device, there is provided on the left hand turntable ZI a templet or pattern I539 which is secured in position by clamps or holding down bolts I I ii. on the other turntable there is provided a blank or work piece I I likewise secured fixedly on its table by holding down bolts and straps as indicated at H2.

In order to provide means for keeping a constant pressure of the feeler on the templet the arrangement best shown in Figs. 3 and 17 is provided. It is to be seen that each yoke is formed in two halves, a head member IE3 being carried on the heads of the yoke legs. These head members ar secured firmly together by means of bolts ll l. At the right hand end of the machine each of the head members is provided with a pair of horizontally disposed bores H5, these bores constituting cylinder portions. In each of the bores is fitted a plunger H6 provided with a suitable packing ring I IT. The bores or cylinders H5 open toward the longitudinal center of the machine and engage against angle stops H8. Mounted above the bore provided head is a pressure cylinder H9 whereon is located a sage I20. This pressure cylinder communicates by branch pipes I2! with the upper ends of manifold passages I22 formed in the head parts H3. Fluid under pressure is provided to the cylinder through a plugged opening I23. This arrangement provides for four plungers equally distributed on both sides of the beam and with the desired pressure shown in the gage I20, the beam will be uniformly urged toward the left of Fig. 2 so that the feeler will engage with a constant pressure the templet as it revolves.

In order to provide necessary lubricating means and also to drive the shaft 44 there is, as shown in Fig. 21, a motor I25. The shaft I25 of this motor has a pulley lie fixed thereon and this pulley is connected by a belt I27 with a pulley I28 fixed on the shaft :29 of a reduction gearing of suitable type, the casing of which is shown at Itil. On the shaft I29 is fixed a second pulley I 3i which is connected by a belt I32 with a pulley I33 carried on a shaft I34. The pulley H33 is a double pulley, this is to say it is arranged to carry a pair of belts side by side. Also carried by this pulley H3 is a belt I35 which connects the pulley I33 to a pulley I36 driving a pump I31. This pump receives lubricating or cooling fluid from a tank I33 and delivers lubricant through a suitable pipe arrangement I39 to desired portions of the machine. The tank I33 is arranged beneath the cutter spindle of the machine and is provided with a wire mesh top I46 so that fluid passing downward through the cutter spindle will be returned to the tank I38.

B the manipulation of the wheels 12, the carriages are adjusted in position so that the feeler will engage the teniplet and the milling cutter will be in position to mill the blank. It is to be noted that the arrangement shown in Fig. 15 is such that the relative positions of the f feeler and the milling cutter will be such that the movement of the milling cutter inwardly and outwardly of the blank will exactly follow the movement of the feeler inwardly and outwardly against the templet.

What is claimed is:

i. In a duplicating milling machine, a base, a spaced pair of turn-tables rotatably supported on said base, driving means for synchronously rotating said turn-tables, a follower associated with one of said turn-tables, a cutter associated with the other turn-table; upstanding guide yokes mounted on said base, a beam slidably supported in said yokes for longitudinal movement over said base, carriages carried by said beam above said turn-tables and respectively supporting said follower and said cutter, and hydraulic pressure means constantly urging the beam in one direction.

2. In a duplicating milling machine, a base, a spaced pair of turn-tables rotatably supported on said base, driving means for synchronously rotating said turn-tables, a follower associated with one of said turn-tables, upstanding guide yokes mounted on said base, a beam slidably supported in said yokes for longitudinal movement over said base, spaced carriages on said beam one of which supports said follower, said carriages being slidable along said beam, nuts rotatably carried by the ends of said beam, and adjusting screws tending through said nuts and fixedto said carriages and hydraulic-pressure: means constantly urging the beam in' one direction.

3. In aduplicatingmilling machine,- a base, a spaced pair of turn-tables rotatably supported on said base, driving means for synchronously rotating said turn-tables, a follower associated with one of said turn-tables, a cutter-associated with the other turn-table, upstanding guide. yokes' mounted on said base, a beam slidably'supported in said yokes for longitudinal movement-over said base, and carriages carried by said beam above said turn-tables, vertical spindles extending through said carriages and respectively supporting said ieeler and said cutter, and drive means for said cutter on the carriage carrying the cutter supporting spindle, and hydraulic pressure means constantly urging the beam in onedirec-- tion.

4. In a duplicating milling machine, abase, a spaced pair of turn-tables rotatably-supported on said base, driving means for synchronously rotating said turn-tables, a follower associated with one of said turn-tables, a cutter associated with the other turn-table, upstanding guide yokes mounted. on said base, a beam slidably supported in said yokes for longitudinal movement over said base, and carriages carried bysaid beam above said turn-tables, vertical spindles ex tending through said carriages and respectively supporting said follower and said cutter, and means for vertically adjusting said spindles in said carriagesr 5. In a duplicating milling machine, a base, a spaced pair of turn-tables rotatably supported on said base, driving meansforsynchronously rotating said turn-tables, a follower associated with one of said turn-tables, a cutter associated with the other turn-table, upstanding guide yokes mounted on said base, a beam slidably supported in said yokes for longitudinal movement over said base, and carriages carried by said beam above said turn-tables, vertical spindles extending through said carriages and respectively supporting. said feeler and saidcutter, and means for vertically adjusting said spindles in said car riages, including bearings mounted for vertical movement in said carriages and supporting said spindles, racks fixed on said bearings, gears rotatably mounted in the carriagesand meshing with. said racks, and manual means-for rotating said gears.

6. In a duplicating milling machine, a base, a spacedpair of turn-tables rotatablysupported on said base, driving means for synchronously rotating said turn-tables, afollower associated with oneof said turn-tables, acutter associated with the other turn table, said driving means including a pair of housings mounted beneath said base below the turn-tables, vertical shaftsjournalled in said housings and attachedto said turn-tables, .vvorm gears fixed on saidishafts, worms in said housings meshing with said worm gears, and a horizontal shaft carrying saidworms, upstanding guide yokes mounted on said base, a beam slidably supported in said yokesforlon= gitudinal movement over said base,; carriages carried by said beam above said turn-tables and respectively supporting said follower and said cutter, and means for independently adjusting: the carriages along the beam.

7. In a duplicating milling machine, a-base, a spaced pair of turn-tables rotatably supported on. said. base; driving means for synchronously. r='- tating=-said turnvalues; a follower .associatedzwith .2

one ofisaid turn-tables, a cutter associated with theother. turn-table, said driving means including a pair of housings mounted beneath said base below theturn-tables, vertical shafts journalled in said housings and attached tosaid turn-tables, worm gears fixed on said shafts, worms in said housings .meshing with said worm gears, and a horizontal shaft carrying said worms, upstanding'guide yokes mounted on base, a beam slidably supported in said yokes for longitudinal movement. over said base, and carriages carried by said beam above said turn-tables and respectively supporting said follower and said cutter, means for independently adjusting the carriagesca'longgthe beam, and: means for. vertically adjusting. said spindles. in said" carriages.

8; In. a duplicating milling machine, a base, a spaced pair of turn-tables rotatably supported on said base, driving means for synchronously ro-v tating'said turn-tables, a follower associated with one of said turn-tables, a cutter associated with the other turn-table, said driving means includingapair of housings mounted beneath said base below the turn-tables, vertical shafts journalled in'said housings and attached to said turn tables, worm gears fixed on said shafts, Worms in said housings meshing with said worm gears, and a horizontal shaft carrying said worms, upstanding guide yokes mounted on said base, a beam slidably supported in said yokes for longitudinal movement over said base, and carriages carried by-saicl beam above said turn-tables and respectively supporting said follower and said cutter, including bearings mounted for vertical movement in said carriages and supporting said spindles, racks'fixed on said bearings, gears rotatably mounted in the carriages and meshing with said racks, and manual means for rotating said gears.

9. In a duplicating milling machine, a base, a

,spaced pair of turn-tables rotatably supported on mounted on said base, a slidably supported in said yokes for longitudinal movement over said base, and carriages carried'by said beam above said turn-tables and respectively supporting said follower and said cutter, brackets on saidbeam, a pair of cylinders fixed adjacent said brackets, plungers in said cylinders acting on said brackets, and an equalizing cylinder having pipe connection with the pair of cylinders.

CARL IWICHAEL ZOLL.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 71,568 Basse Dec. 3, 1867 731,870 Echcls June 23, 1903 856,306 Smith June 11, 1907 895,383' Mangels Aug. 4, 1908 1,024,516 Lund Apr. 30, 1912 1,597,741 'lopham Aug. 31, 1926 1,770,458 Castonguay July 15, 1930 1,796,079 Boyle Mar. 10, 1931 13 M323 Parten Feb. 9, 1932 2,137,462 Romaine Nov. 22, 1938 2,228,583 Parsons Jan. 14, 1941 2,330,566 Edmonds et al Sept. 28, 1943 FOREIGN PATENTS Number Country Date 453,965. Great Britain Sept. 22, 1936 

